Make a pass through all the nearby new and or used car dealers, see if something on the lot catches your eye. If you can tell the paint store make, model, and approximate year then look at those chips you can normally nail down the color.
If you aren't finding what you are after, ask for any custom or specialty color info they have. Big brands will offer something. Kind of sounds like a silver with green pearl in it but not ringing a bell with me. A color like that might be called "Fern" something. All I got for you are those general tips.